What mass, in grams, of water would form if 4.8 grams of hydrogen reacted with 38.4 grams of oxygen?

Answers

Answer 1

Answer: 4.8 grams of hydrogen is 2.4 moles, and 38.4 grams of oxygen is 1.2 moles. This is exactly the Stoichiometry ratio of the reaction, therefore the two will both completely react giving rise to the same total mass of water.


Related Questions

A marble was rolled along the a flat surface. The position and data was collected.

What type of graph would best represent the data?
A. Pie chart
B. Bar graph
C. Histogram
D. Scatter plot

Answers

D. A scatter plot
Should be the correct answer

Total these measurements. Your answer should indicate the proper accuracy.
28 L
42 L
6 L
931 L
____

Your answer should indicate the proper precision (correct number of insignificant figures).

1. 1,010 L
2. 1,007.0 L
3. 1,007 L
4. 1,000 L

Answers

Answer:

The sum of given measurements is 1007 L.

Explanation:

The given measurements are 28 L, 42 L, 6 L, and 931 L.

We need to find the total of these measurements.

Total = 28 L + 42 L + 6 L + 931 L

It can be written as

Total = ( 28 +42+6+931)

One simplification we get Total = 1007 L

The answer on top of me is correct! have a nice day good luck

What is one important step to complete before starting a laboratory experiment?
O Clean up the materials that were used.
Discard chemicals in the proper waste bin.
O Ask the teacher if you are confused about the laboratory procedure.
Change into contact lenses to protect your glasses,

Answers

Answer:

Ask the teacher

Explanation:

Ask if you have to clean up or if you are not prepared for an experiment

Answer:

ask the teacher

Explanation:

because he needs help so he has to task the teacher.

Which of the following properties of an unknown substance would allow it to be classified as a mixture? The unknown substance

Answers

Answer:

D. has different properties when sampled in different areas.

Explanation:

The general property of a mixture says that each substance or component in a mixture has its individual or different property which can be separated on the basis of different methods.

Such as a mixture of oil and water is a heterogeneous mixture and have different properties or different densities, which helps them to be sampled in different areas.

Hence, the correct answer is "D".

How can nuclear energy be converted in electrical energy

Answers

Answer:

A clean energy resource

Nuclear energy originates from the splitting of uranium atoms – a process called fission. This generates heat to produce steam, which is used by a turbine generator to generate electricity. Because nuclear power plants do not burn fuel, they do not produce greenhouse gas emissions.

Explanation:

Answer:

Nuclear energy originates from the splitting of uranium atoms – a process called fission. This generates heat to produce steam, which is used by a turbine generator to generate electricity. Because nuclear power plants do not burn fuel, they do not produce greenhouse gas emissions.

Explanation:

How would you separate a mixture of sand, salt, and iron?

(Put it in a list)

Answers

adding onto the above persons answer which are both correct, to get the sand out of the water you would use filtration and pore the water through a filter which would leave the sand sitting on top of the filter

Why shouldn’t we fill up balloons with hydrogen gas ?

Answers

Answer: Because hydrogen is a gas.

Explanation: If children were running around with balloons filled with hydrogen gas, then they would catch fire. So the answer to your question is, its simply dangerous.

Sam is making an aquaponics garden. He needs 2.3 dkg of granite. He has 460 g. How much more does he need? Explain your answer with your work. ​

Answers

Explanation:

He needs 2.3 dkg

dkg is a unit of mass and represents dekagrams.

The relationship between dkg and g is given as;

1 dkg = 10g

This means he needs 2.3 * 10 = 23 g of graphite.

Since he already has 460g of graphite, he doesn't need any additional graphite.

What do group numbers on the periodic table identify?

Answers

The group number is an identifier used to describe the column of the standard periodic table in which the element appears. Groups 1-2 termed s-block elements. Groups 1-2 (except hydrogen) and 13-18 are termed main group elements.

valence electrons

which is an outer shell electron

The healing of a cut finger. Is it a physical or chemical change? Explain.

Answers

i would say it’s more chemical than it is physical. when you cut yourself there’s usually blood, correct? because a blood clot forms here & cells begin to work on the wound, which would be physical. the chemical part though is there’s an enzyme I think called thrombin which helps the formation of fibrin mesh. this helps stable the blood clot while the cells heal & close the wound with a potential small scar.

Wound healing is a chemical change.

A chemical change involves the formation of a new substance. A substance changes form from one form into another in the process. A physical change does not involve the formation of new substances. Wound healing involves a number of chemical changes.

A wound can also be referred to as a tissue damage. When a tissue is damaged, bleeding results. Bleeding could lead to so much loss of blood.

The human body has mechanisms in place to combat this excessive loss of blood. This occurs when a complex biochemical pathway leads to the formation of fibrinogen. The enzyme thrombin converts fibrinogen to fibrin. The formation of fibrin is very essential to the wound healing process.

We can see that a series of chemical changes are involved in the process of wound healing when your finger is cut.

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Materials expand when heated. Consider a metal rod of length L0 at temperature T0. If the temperature is changed by an amount ΔT, then the rod’s length changes by ΔL=αL0ΔT, where α is the thermal expansion coefficient.
For steel, α=1.24×10−5∘C−1.(a) A steel rod has length L0=40cm at T0=40∘C. What is its length at T=180∘C?
(Use decimal notation. Give your answer to three decimal places.)
L≈cm
(b) Find its length at T=90∘C if its length at T0=120∘C is 65 in.
(Use decimal notation. Give your answer to three decimal places.)
L≈ in.
(c) Express length L as a function of T and α if L0=60in. at T0=150∘C.
(Use symbolic notation and fractions where needed.) L(T,α)=

Answers

Answer:

(a) The length at temperature 180°C is 40.070 cm

(b) The length at temperature 90°C is 64.976 inches

(c) L(T, α) = 60·α·T - 9000·α + 60

Explanation:

(a) The given parameters are

The thermal expansion coefficient, α for steel = 1.24 × 10⁻⁵/°C

The initial length of the steel L₀ = 40 cm

The initial temperature, t₀ = 40°C

The length at temperature 180°C = L

Therefore, from the given relation, for change in length, ΔL, we have;

ΔL = α × L₀ × ΔT

The amount the temperature changed ΔT = 180°C - 40°C = 140°C

Therefore, the change in length, ΔL, is found as follows;

ΔL = α × L₀ × ΔT = 1.24 × 10⁻⁵/°C × 40 × 140°C = 0.07 cm

Therefore, L =  L₀ + ΔL = 40 + 0.07 = 40.07 cm

The length at temperature 180°C = 40.07 cm

(b) Given that the length at T = 120°C is 65 in., we have;

The temperature at which the new length is sought = 90°C

The amount the temperature changed ΔT = 90°C - 120°C = -30°C

ΔL = α × L₀ × ΔT = 1.24 × 10⁻⁵/°C × 65 × -30°C = -0.024375 inches

The length, L at 90°C is therefore, L = L₀ + ΔL = 65 - 0.024375 = 64.976 in.

The length at temperature 90°C = 64.976 inches

(c) L = L₀ + ΔL  = L₀ +  α × L₀ × ΔT = L₀ +  α × L₀ × (T - T₀)

Therefore;

L = 60 +  α × 60 × (T - 150°C)

L = 60 + α × 60 × T - 9000 × α

L(T, α) = 60·α·T - 9000·α + 60

3. Complete the following conversions.
a. 10.5g=__kg
b. 1.57 km = ___m
c. 3.54 ug = ___g
d. 3.5 mol=___umol
e. 1.2 L = ___mL
f. 358 cm = ____m3
g. 548.6 ml. =____cmii

Answers

Answer:

a. 0.0105

b. 1.570

c. 0.00000354

d. 35,000,000

e. 1200

f. 0.000358

g. 548.6

The complete conversion of the given examples are as follows:

a. 10.5g =  0.00105  kg

b. 1.57 km = 1570 m

c. 3.54 ug = 3.54 × 10⁻⁵ g

d. 3.5 mol = 3.5 × 10⁶ umol

e. 1.2 L = 1200 mL

f. 358 cm = 3.58 × 10⁻⁴ m³

g. 548.6 ml = 548.6 cm

Conversion is a multi-stage procedure, which requires a numerical factor to multiply or divide and the appropriate selection of a number of important digits.

Using the International System Units for Conversions Factors.

(a)

If 1 g = 0.001 kg

10.5 g will be:

[tex]\mathsf{= \dfrac{10.5 \ g \times 0.0001 \ kg}{1 \ g}}[/tex]

= 0.00105  kg

(b)

If 1 km = 1000 m

1.57 km will be:

[tex]\mathsf{= \dfrac{1.57 \ km \times 1000\ m}{1 \ km} }[/tex]

= 1570 m

(c)

If 1 ug = 1 × 10⁻⁵ g

3.54 ug will be:

[tex]\mathsf{= \dfrac{3.54 \mu g \times 1 \times 10^{-5} \ g }{1 \ \mu g}}[/tex]

= 3.54 × 10⁻⁵ g

(d)

If 1 mol = 10⁶ umol

3.5 mol will be:

[tex]\mathsf{= \dfrac{3.5 \ mol \times 10^6 \ u \ mol}{1 \ mol} }[/tex]

= 3.5 × 10⁶ umol

(e)

If 1 L = 1000 mL

1.2 L will be:

[tex]\mathsf{=\dfrac{1.2 \ L \times 1000 \ mL}{1 \ L}}}[/tex]

= 1200 mL

(f)

If 1 cm = 0.000001 m³

358 cm will be:

[tex]\mathsf{= \dfrac{358\ cm \times 0.000001 m^3}{1 \ cm}}[/tex]

= 3.58 × 10⁻⁴ m³

(g)

If 1 mL = 1 cm

548.6 mL will also be equivalent to 548.6 cm

Therefore, from the above explanation, we've seen how to convert from one unit to another.

Learn more about conversion rates here:

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A bar if soap is 12cm tall 6 cm wide and 10 cm long if has a mass of 415 grams what is the density is

Answers

Answer:

density= mass/volume. volume= 12 x 6 x 10. 415/720=.57g/cm^3

Explanation:

Answer: 0.58g/cc density of the Soap.

Explanation:

Round 1047.78 to three sig figs
105
100
1030

Answers

Answer:

1047.78

nearest tens is 1047.70

nearest thousandth is 1050.78

An ice cube is left on the kitchen counter. After some time, the ice cube melts into a small puddle of water.According to the law of conservation of mass, how does the mass of the puddle of water compare to the mass of the original ice cube

Answers

Answer:

Mass of the water is equal to the mass of ice

Explanation:

When ice melts, the mass remains the same even though its volume decreases leading to a decrease in density of water.

The mass remains the same because according to the law of conservation of mass, mass can neither be created nor destroyed. Since mass is neither created nor destroyed in the process of melting, the mass of water must remain the same.

which light would you predict to produce the greenest plant

Answers

Explanation:

The light of the sun is important for green plant to grow

starting from phenol how would you obtain benzaldehyde

Answers

Answer:

A significant quantity of natural benzaldehyde is produced from cinnamaldehyde obtained from cassia oil by the retro-aldol reaction: the cinnamaldehyde is heated in an aqueous/alcoholic solution between 90 °C and 150 °C with a base (most commonly sodium carbonate or bicarbonate) for 5 to 80 hours, followed by ...

Explanation:

Which statements about volume are true? Choose all the answers that apply. Group of answer choices Does not apply to liquids Applies only to objects with irregular shapes Measures the amount of space occupied by an object Equals the displacement of an object in water Lacks physical dimension Can be measured in milliliters or cubic centimeters

Answers

Answer: Measures the amount of space occupied by an object

Equals the displacement of an object in water Lacks physical dimension Can be measured in milliliters or cubic centimeters

Explanation:

The statements which are true about volume are;

Measures the amount of space occupied by an object.

Equals the displacement of an object in water.

Discussion:

The volume of an object is a measure of the space it occupies. On this basis is the definition of matter as an object that occupies space.

Additionally, when an object is immersed in water; it's volume equals the volume occupied by the water displaced by it.

Read more;

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An object velocity can be described by I s acceleration and direction

Answers

Answer:

Yes.

Explanation:

does ice steam or water have more energy

Answers

Answer:

steam.

Explanation:

Gasses have the most kinetic energy compared to liquids and solids.

steam is the gaseous form of h2o

water is the liquid form and ice is the solid


Find the distance between the two points on a number line
-18 and -4

Answers

Answer:

14

Explanation:

Can someone find the independent variable and the dependent variable ?

Answers

Independent Variable here is ”Speed”, since the independent variable is defined as (what's the scientist changes or what changes on its own)... And in here, both cars were traveling at 60 mph ’at a certain point, so, one of them might speed up or stay behind/lower it's speed from the other, depending on it's driver’.

Dependent Variable here is ”Distance”, since the dependant variable is defined as (what s being studied/measured).

Based on the physical appearance of the two crystal samples, which is a metal?

Answers

Answer:

The Answer Is: A: Sample A

Explanation:

Because It Is Shiny ( Part of what the person said on edge)

Answer:

Sample A

Explanation:

On edg 2020

Sorry is if  i'm answering this late. T^T

What NaClNaCl concentration results when 259 mL259 mL of a 0.850 M0.850 M NaClNaCl solution is mixed with 567 mL567 mL of a 0.240 M0.240 M NaClNaCl solution?

Answers

Answer:

0.431M

Explanation:

To find the concentration of NaCl we need to know how many moles comes from each solution. Then, we need to sum the total volume in liters and, as molarity (Unit of concentration) is the ratio between moles and volume we can determine concentration.

Moles from first solution:

259mL = 0.259L * (0.850mol / L) = 0.22015 moles of NaCl

Moles from second solution:

567mL = 0.567L * (0.240mol / L) = 0.13608 moles of NaCl

Total moles:

0.22015 + 0.13608 = 0.35623 moles of NaCl

Total volume:

259mL + 567mL = 826mL = 0.826L

Thus, molarity of the mixture is:

0.3562 moles NaCl / 0.826

0.431M

A model of an atom shows eight electrons in rings that represent different energy levels. How many electrons are in each energy level?
A. zero in the first energy level, eight in the second energy level
B. eight in the first energy level, zero in the second energy level
C. four in the first energy level, four in the second energy level
D. two in the first energy level, six in the second energy level

Answers

Answer:

energy level I can hold a maximum of two electrons, and energy level II can hold a maximum of eight electrons. so it must be D

Explanation:

two in the first energy level, six in the second energy level

i took the test already you can go to my quizlet to get study cards for the test

Number of
Protons
Number of
Neutrons
Atomic
Number
Mass
Number
Element
(symbol)
20
20
A
B
С
9
D
E
19
F
Using the periodic table, complete the table to describe each atom. Type in your answers.

Answers

Answer:

symbol= F

proton= 9

neutron= 19 I understand this is it ok for you

How were the ideas of Aristotle and Democritus similar to the alchemists'?

Answers

Answer:

The ideas of Aristotle and Democritus were on a similar basis to the alchemists.

Explanation:

Aristotle believed that all matter was made from four elements: earth, air, fire, and water. Democritus was the first person to realize that if something was cut in half continuously it can never be broken down completely. Democritus called the units that could not be broken down atoms. Early alchemists believed and based their works on the notion that atoms could be rearranged into making new elements. All three of their ideas more or less work with atoms and elements.

In addition to describing and explaining mental processes and behavior, psychology also attempts to __________ these phenomena. Group of answer choices

Answers

Answer:

The correct approach will be "Predict and control ".

Explanation:

Psychology seems to be the study including its thought process as well as behavior. The psychological layouts in this article that the individual requires to understand, feel, and so on, whereas action seems to be how someone behaves. Psychologists as well as physicians speculated about either the relation was seen between the mind and perhaps the nervous system while philosophers struggled to understand the links between the organs.

HELP ASAP PLEASE
Outline a sample experiment you could set up to investigate the effect of drinking Starbucks on student test scores. List all components in the 2nd objective above.

Answers

Randomly pick 50 students from each grade level. 1:1 ratio of boys to girls. Randomly section 1/2 of the 50 students from each grade level into groups A and B. Have group A drink Starbucks. Have group B drink nothing. Hand the same academic test of mixed subjects to each student. Record the data.

All of the atoms of argon have the same

a
mass number
b
atomic number
c
number of neutrons
d
number of nucleons

Answers

The answer is same atomic number!

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